Help with Switching System or Splitter

I want to run my bass to either a Switch (A/B/Y) or a Splitter so I can run 2 amps with 2 cabs. What are the best choices for this setup. I'm also thinking of getting a SVT-2PRO or CL head and 2 410HLF cabs and run both as a stereo mix. The rig from hell.